Finding the Fourth Proportional to 917,100.50, 1,265,574.56 and 509,191.83

Step by Step Solution

1. Step 1: Write the proportion equation
   917,100.50 : 1,265,574.56 = 509,191.83 : x
2. Step 2: Convert to fraction form
   917,100.50/1,265,574.56 = 509,191.83/x
3. Step 3: Cross multiply
   917,100.50x = 1,265,574.56 × 509,191.83
4. Step 4: Simplify right side
   917,100.50x = 644,420,223,661.89
5. Step 5: Solve for x
   x = 644,420,223,661.89/917,100.50
6. Step 6: Final answer
   x = 702,671.33